Illuminator attachment for microscopes



April 20, 19 7. HEM 2,077,792

ILLUMINATOR ATTACHMENT FOR MICROSCOPES Filed Dec. 30, 1932 2 Sheets-Shoat 2 I. "ml:

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' ATTORNEY Patented Apr. 20, 1937 UNITED STATES ILLUMINATOB ATTACHMENT FOR MICRO- SCOPES Hermann Heine, Wetllar, Germany, assignor to Ernst Lelia, Optische Werke, Wetslar, German! Application December so. 1932, Serial N1. 649,469 In Germany January 2, 1932 1 Claim. o1. 86-40) This invention relates to improvements in microscopes, particularly microscopes used with photographic cameras, and the principal object of my invention is the provision of a means to 5 regulate the illumination in such manner as to enable the operator to either make use of a source of a weak light for the observation of the object or to cut in a source of a strong light for the making of pictures of the object.

graphic taking of pictures the microscope including the camera is not subjected to shocks or shaken, in order not to destroy the exact focus or the distinct'ness of the illumination.

With the known devices of this character extreme precaution was necessary to operate the camera and in short succession close the circuit of a contact releasing or disengaging device in such manner that either the light rays of a source of weak light forthe making of observations, or the rays of a source for a strong light for the making of pictures may become selectively operative. To this end I find in practice that it is best to arrange the mirror within a tubular projection of the vertical illuminator at an angle of 45? to the axes of the bunches of rays emanating from the sources of light for the making of observations or for the taking of pictures. if for instance the first named source of light is operating.

The contact controlling device is so construct- I ed, that simultaneously with the removal of the I obtain by such an arrangement of the illuminating system a perfect stable and unchangeable.position of' the'picture and 01 the illum nation.

invention will become more fully known as the description thereof'proceeds and will then be more specifically defined in the appended claims.

On the drawings:

It is essential that during the microphoto-.

These and other objects and advantages of my Fig. 1 shows diagrammatically a device constructed according to my invention.

Fig. 2 is a perspective view of a somewhat modified form or contact engaging or disengaging device.

Fig. 3 is a fragmentary sectional view thereof.

Fig. 4 shows a device for locking the contact control device in the disengaged position.

As illustrated, the microscope eyepiece or tubeit carries or supports a camera I: equipped with a laterally disposed sight c.

An illuminator carrier (1' is provided on the microscope tube and vertical illuniinator d for the support of the leaders of the rays from sources of a stronger light I and a weaker light designated e respectively to the microscope to be finally directed upon the object g.

An adjustable inclined mirror It can be cut in and out of theray path and in its out in position reflects the light rays i of the source of the weaker light e at an angle of about in the direction-of the microscope tube and simultaneously obturates the rays k of the source of the stronger light I by its opaque rear face.

Besides the shutting out of the rays by the mirror, these rays k which serve to illuminate a photographic or sensitive layer from the source of thestronger light I, can also be shut of! or set free by means of a shutter l in the path of the rays..and the photographic shutter is'so arranged bysuitably mounting the same, eventually with the use of suspension springs, that it cannot be shocked or shakenduring the operation.

In front 'ofeach source of light suitable condenser systems m, n, n, are provided. Another photographic shutter v is arranged on the camerab.

In order to deflect the light rays reflected by' the object into the lateral ocular c an adjustable mirror il' prism is arranged in the lower part or the camera b.

The sources of light e and I are connected by means of the contact 6 at the end of .conductor p; and contact ii at the end of conductor 11, said contacts being arranged on a rail It in box 0.

All the releasing organs are operated by means of an operating knob 10. If pressure: is exerted upon thejknob w a contact pin sch on a movable contact block ll at'the end of. a plunger rod l3 carrying the operating knob 10 at its outer-end, and slidably arranged in a tube It secured to box 0, is successively; disengaged from contact i so as to open tn; circuit in which the-source of the weaker light e is located and engages contact 6 to close the circuit in which position by means of the spring 20' wound about the rod II between knob 10 and a disc ll on tube l3. As shown in Figure 2, plungers II, l6, l1 and "i are slidably arranged in the tubes l5, l6, l1 and 18 extending into box 0.

The inner ends oi'the plungers II, II, II and II carry heads ll", I9, 20 and 2|! respectively within the box 0, and about the shanks of the plungers springs II, 22 and 23 are wound between the block ii and the heads l8", ll. 2. and 20' to be compressed during the circuit biasing operations, and byitheir expansion upon the release of knob w'to carry the plungers back into their original positions, after each operation, and to these rods or plungers the pull cords r, st, u and s are attached, for opening the shutter v and thereafter shutter l which has been suitably time d. Upon the release of the 'knob to the parts return again into their original position, the source f of the stronger light is cut out and the source or light e is again out in for further observations.

A switchz on conductor cord 11 allows a cutting in and out of the light source I independently from the releaser to, while a: designates an electric resistance for the light sources. As shown, .the pull cords u and st, operating the shutter v of the camel: and the mirror in housing t, and sliding through suitable recesses in the wall of the box 0, are attached to the heads on the plungers l5. and I8, and the pull cords r, s also sliding through recesses in the wall of box '0 and operating the mirror It and shutter l are attached to the heads on the plungers Il', I8

and thus the closure 01' the circuit-by the engagement of contactpin I2 with contact 6 will The engagement of contact-il'by the contact pinl2, will close .a circuit to bring the source of the weaker light e into operation, and simultaneously operate mirror It and shutter t to allow the observation of the object a under the microscope.

In the modified form of my invention illustrated in Figures 2, 3, and 4, I use substantially the same construction shown in Figure l', with the exception that I use two releasing devices which are operated by means 0! a'sllding pin G for the operation or the contacts K, Kl. 'l'he pin G may be held in its adjusted position by means of the latching pin F.

It will be understood that I have described and shown the preferred forms of my device only Patent is:

In an attachment for illuminating microscopes combined with a camera. a source of a weak light for illuminating the object to be observed through the microscope, and a source. oi strong light for taking pictures of the object observed, an adjustable mirror between the two light sources reflecting the light rays of the source of the weaker light at an angle of about 45? in the direction of the microscope and simultaneously obstructing or obturating the rays of 1 the source of stronger light, means to alternately out said light sources in and out by the operation of said mirror, and a control means therefor comprising a box, a rail on said box. contacts in said rail connected to the said light sources, a movable contact piece having a contact finger in said box, means to alternately bring said contact finger in 'and out 01' contact with said contacts to close either, the circuit in which the source of the weaker light is located, or the circuit in which the source 01 the stronger light is located, shutters in the camera and in front of the source for the stronger light, to be operated by the operation of said contact finger operating means, a plurality of spring controlled pull rods in said box one of said rods connected to the mirror and the others connected ,to the shutters, said rods adapted to be operated by said means operating said contact fingerto operate said mirror to alternately reflect the rays from the source of weak light and obturate the light rays from the source of stronger light.

Herbalism. 

